| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. |
| 3 | * |
| 4 | * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net) |
| 5 | */ |
| 6 | |
| 7 | #ifndef _IOMMU_COMMON_H |
| 8 | #define _IOMMU_COMMON_H |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/scatterlist.h> |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/iommu-helper.h> |
| 17 | |
| 18 | #include <asm/iommu.h> |
| 19 | |
| 20 | /* |
| 21 | * These give mapping size of each iommu pte/tlb. |
| 22 | */ |
| 23 | #define IO_PAGE_SHIFT 13 |
| 24 | #define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT) |
| 25 | #define IO_PAGE_MASK (~(IO_PAGE_SIZE-1)) |
| 26 | #define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE) |
| 27 | |
| 28 | #define IO_TSB_ENTRIES (128*1024) |
| 29 | #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8) |
| 30 | |
| 31 | /* |
| 32 | * This is the hardwired shift in the iotlb tag/data parts. |
| 33 | */ |
| 34 | #define IOMMU_PAGE_SHIFT 13 |
| 35 | |
| 36 | #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) |
| 37 | |
| 38 | static inline int is_span_boundary(unsigned long entry, |
| 39 | unsigned long shift, |
| 40 | unsigned long boundary_size, |
| 41 | struct scatterlist *outs, |
| 42 | struct scatterlist *sg) |
| 43 | { |
| 44 | unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); |
| 45 | int nr = iommu_num_pages(paddr, outs->dma_length + sg->length, |
| 46 | IO_PAGE_SIZE); |
| 47 | |
| 48 | return iommu_is_span_boundary(entry, nr, shift, boundary_size); |
| 49 | } |
| 50 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 51 | #endif /* _IOMMU_COMMON_H */ |